I just have the 2 chickens. I have had them for 11 months and have layed about 5 eggs a week even through the winter. Yesterday though I noticed one of them seemed off colour, she was fine in the morning, and was eating fine, but later in the afternoon she seemed to go quiet, and just standing around a lot and not showing much interest. This morning when I opened a door there was just a yolk on the floor and she was sat in the box, which is unusual. I got her out, but she doesn't want anything to eat and keeps going back to her box and seems quite unsteady. Should I be worried? I had an egg from her on Friday.